My only point is that the absurdity of the note, from the book, has a very clear point, and is not there just for fun. It has multiple layers. Tolkien was saying something very pointed about hobbits (the reader), dwarves (representatives of a forgotten age), and their relationship to each other. Two very different philosophies were clashing in Bag End.

The movie contract essentially shows that the dwarves are very similar to hobbits in their prosaic, mundane attention to legalistic detail, and in their modern use of language. This upends the "clash" of worldviews that happens in the book. The prosaic vs. the poetic, the foolishly proud vs the practical, the adventurous vs. the grocer, and the legalistic vs the idealistic.

The book contract was a deliberate mockery of hobbit practices. You can almost feel the sarcasm in that note. The movie contract, on the other hand, is a mockery of dwarven ways that aren't actually dwarven ways! They are hobbit ways. Modern, Edwardian, of the legalistic age, or whatever you want to call it.

That's why I think this change speaks to a fundamental misunderstanding of what the dwarves represent.